Yeah, yeah. In space, no one can hear anything. But that doesn’t mean that sound waves can’t exist. You just need the right kind of “ears.”
Earlier this week, it was confirmed that Voyager 1 had finally entered interstellar space at a distance (as I write this) of 19,096,932,511 kilometres. But it’s been “listening” to the sounds (well, vibrations, but that’s the same thing) of dense interstellar plasma for some time now. That space sounds like this.
(Thanks to Larry for the link.)